Henrys Lake and Henrys Lake water level

Name: Henrys Lake and Henrys Lake water level (U.S. Bureau of Reclamation)
Creator: U.S. Bureau of Reclamation
License: https://www.usbr.gov/main/disclaim.html

Lake, Idaho, United States

Directions

Low for mid-October

Surface elevation

12.89ft Steady over the last 7 days

Measured Oct 18, 2026 (2 days ago)

Water stored: 66,181 acre‑ft

History

What this means

Water is short at Henrys Lake and Henrys Lake: the latest reading of 12.89 ft is below normal for mid-October.

That puts it 2.01 ft below the median of 14.90 ft for mid-October, based on 36 years of readings. A year ago it stood at 14.70 ft (−1.81 ft).

The level has held steady over the past week. The 30-day range is 12.78 ft – 13.00 ft.

Lakes and reservoirs often sit lower in fall after a summer of evaporation and use, and recover with winter rain and spring snowmelt.

Compared with 36 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 14.90 ft2.01 ft below the median for this date
Normal for this date: 12.31 ft – 15.99 ft8 years in 10 fall in this range (36 years of records)
Same day last year: 14.70 ft−1.81 ft
Lowest and highest in 30 days: 12.78 ft – 13.00 ft
Lowest and highest in 12 months: 12.65 ft – 16.67 ft

Boating and fishing at Henrys Lake and Henrys Lake

At low levels, launching can mean a long walk or a closed ramp, and shallow points stick out further than charts suggest.

Conditions at the shore change with the level, so check with the agency that runs the lake before a trip.

Weather at the gauge

No rain in the last 3 days.

17 Sat 57° 28° – Wind 20 mph

18 Sun 60° 36° – Wind 15 mph

19 Mon 60° 36° – Wind 11 mph

20 Tue 60° 42° 0.06 in Wind 10 mph

21 Wed 61° 39° – Wind 12 mph

22 Thu 62° 38° 0.14 in, 43% Wind 9 mph

23 Fri 46° 31° 1.45 in, 79% Wind 10 mph

Forecast: Open-Meteo

Sunrise 07:48 AM Sunset 06:34 PM Daylight 10 hr, 46 min First quarter 64%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Henrys Fork near LakeRiver gauge, Henrys Fork	0.4 cfs	Very low	+0.1 cfs	0.3 mi
Island Park ReservoirReservoir	6,281.72 ft	Low		13 mi
Henrys Fork near Island ParkRiver gauge, Henrys Fork	89.9 cfs	Very low	−2.0 cfs	13 mi
Madison River near West YellowstoneRiver gauge, Madison River	303 cfs	Very low	±0	15 mi
Madison River below Hebgen Lake near Grayling MTRiver gauge, Madison River	707 cfs	Very low	±0	19 mi
Madison River at Kirby Ranch near Cameron MTRiver gauge, Madison River	788 cfs	Low	+9.0 cfs	23 mi
Firehole River near West Yellowstone MTRiver gauge, Firehole River	200 cfs	Very low	+2.0 cfs	24 mi
Gibbon River at Madison Jct, YNPRiver gauge, Gibbon River	70.0 cfs	Very low	−3.2 cfs	24 mi

Questions and answers

How does Henrys Lake and Henrys Lake compare with last year?

It is 1.81 ft lower than on the same day last year, when the reading was 14.70 ft.

What is a normal level for Henrys Lake and Henrys Lake in mid-October?

The median for mid-October is 14.90 ft. In 8 years out of 10 the reading falls between 12.31 ft and 15.99 ft, based on 36 years of records.

Is Henrys Lake and Henrys Lake really 12.89 ft deep?

No. 12.89 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Henrys Lake and Henrys Lake today?

On Oct 18, 2026, the surface elevation was 12.89 ft. Steady over the last 7 days.

Is Henrys Lake and Henrys Lake rising or falling?

Steady over the last 7 days.

Is the level of Henrys Lake and Henrys Lake normal?

Low for mid-October. Compared with 36 years of daily readings for this time of year.

How often is this data updated?

The U.S. Bureau of Reclamation publishes a new reading once a day. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Bureau of Reclamation
Station code: usbr:7180 (Agency page)
Coordinates: 44.59722, -111.35361 (WGS84)
Update interval: once a day
Licence: Public domain. Data: U.S. Bureau of Reclamation (RISE), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Surface elevation	12.89 ft	2026-10-18 06:00	Provisional
Water stored	66,181 acre‑ft	2026-10-18 06:00	Provisional

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How to cite

U.S. Bureau of Reclamation: Henrys Lake and Henrys Lake (usbr:7180). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/idaho/henrys-lake-and-henrys-lake

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer